Sike Lock Steel Silver Galvanized Finish Length (In.) 3 5/16 in Height (In.) 2 3/16 in Width (In.) 1 in Depth (In.) 6 7/16 in Wheel Diameter Not Applicable Roller Width/Dia. (In.) No Roller Surface Mounting Mounting Hole Size (In.) 9/32 in Number of Wheels 0 Steel Hardware Included Requires 1/4 In.-20 x 1 7/8 in Carrage Bolt with Nut For Use With Sectional Garage Door